Merge branch 'master' into ng/master

Merge branch 'master' into ng/master

* master:
  tests: avoid a spurious failure with Solaris /bin/sh
  tests: fix buglet in t/missing3.sh
  self tests: avoid spurious failures on older bash
  tests: remove t/parallel-tests-many.sh (fixes spurious failure)
  typofix: in a comment in the automake script
  news: minor fixlets and reordering

+ Extra non-trivial edits:

* t/parallel-tests-many.sh: Do not deleted; keep the correct and
improved version from the 'ng/master' branch.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>